Photography. the ability of an emulsion to record the brightness values of a subject in their true proportion to one another, expressed as the ratio of the amount of brightness in the darkest possible value to the amount of brightness in the brightest:
late 14c., from L. latitudo "breadth, width, extent, size," from latus "wide," from PIE base *stela- "to spread" (cf. O.C.S. steljo "to spread out," Arm. lain "broad"). Geographical sense also is from late 14c., lit. "breadth" of a map of the known world.
A measure of relative position north or south on the Earth's surface, measured in degrees from the equator, which has a latitude of 0°, with the poles having a latitude of 90° north and south. The distance of a degree of latitude is about 69 statute miles or 60 nautical miles (111 km). Latitude and longitude are the coordinates that together identify all positions on the Earth's surface. Compare longitude.